bVinyls

So I've started building this new PC, on Friday I went to Microcenter, and purchased the following.
 
Corsair Carbide 88R Case
Core i5 6600k
128gb SSD (For windows)
Corsair H55 Water Cooler
Mobo (Can't remember the exact model, but it's M ATX and I've loved it so far)
8GB (2x4) DDR4 RAM
1tb HDD
 
I'll post some pic's of what I've done so far, and I've had 0 issues with it (at least in the little time I've had it)
So my question for you guys is;
I'm getting some LED's, New PSU, and new Graphics Card. What should I get?
For the LED's, I'm thinking Purple, or green, or maybe even blue.
For the New PSU I'm thinking 500-650w
and for the New Graphics card, I'm thinking of waiting till the 480 comes out and getting one of those.
 
Also, I want the PSU cables to match the colour of my build, so what should I do for that? Cable sleeves or..?
 
ONE MORE THING: I've got tons of room off to the right of the inside of the case, what should I put there?

Yeah that was just there after I first booted it, I've re-arranged it and put it in the correct spot, and moved my HHD's into the bay.
Thanks  

Thanks alot for the response.